Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Reexamination Certificate
2001-05-29
2004-12-21
Couso, Jose L. (Department: 2621)
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
Reexamination Certificate
active
06834123
ABSTRACT:
BACKGROUND
This disclosure is related to image compression and/or decompression.
As is well-known, discrete wavelet transform (DWT) approaches have been employed in compression and decompression of images and video. One aspect of these approaches frequently employs a process often referred to as embedded zerotree (EZT) coding or encoding. Some of the drawbacks of the existing embedded zero tree coding process include two passes for each level of coding, ie, a dominant pass and a subordinate pass, and, high computational complexity not suitable for interactive video compression. A need, therefore, exists for an approach to EZT coding that addresses these issues.
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Acharya Tinku
Biswas Prabir K.
Raghu Kokku
Couso Jose L.
Intel Corporation
Wong Sharon
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